Volcano Calendar 2018: We're proud to present our 2018 volcano calendar: 13 different and attractive images of volcanoes, volcanic landscapes and phenomena taken during volcano tours over the past few years.

The Volcano Adventure Guide: Excellent information and background for anyone wishing to visit active volcanoes safely and enjoyably. The book presents guidelines to visiting 42 different volcanoes around the world.

News

A submarine eruption has likely occurred this morning in Indonesia. VSI raised the alert level of Iliwerung volcano from 1 (normal) to 2 (watch) following increased seismic and visual activity from an underwater flank vent called Gunung Hobal. ...
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Iliwerung volcano forms a prominent south-facing peninsula on Lembata (Lomblen) Island and lies 80 km east of Flores. Its craters and lava domes have been built along N-S and NW-SE trend. In historical time both vents from the summit and submarine vents on the SE flank have been active.

Background:

Iliwerung volcano was constructed on the southern rim of the Lerek caldera. The present-day summit lava dome was built during an eruption in 1870. In 1948 the Iligripe lava dome grew on the eastern flank at 120 m altitude. In 1973-74, 3 temporary new islands were formed, when submarine eruptions began on the lower SE flank at a vent named Hobal.

1993 submarine eruptionA submarine eruption took place at the Hobal vent at 50 m water depth, ca. 1 km SE off the coast of Iliwerung on 16 September 1993. The eruptions produced a water column 100 m high. ...more

1983 submarine eruptionExplosions occurred 17 and 18 August from a submarine vent south of Iliwerung.

1979 landslide and deadly tsunamiIn July 1979, a large landslide removed ca. 50 million m3 from the NW flank of Iliwerung volcano, a third of which reached the sea and caused a tsunami that killed hundreds of people.

1973-74 submarine eruptions, temporary islandsSubmarine eruptions between December 1973 and August 1974 created 3 new temporary islands, which subsequently were eroded and disappeared. ...more

1948 flank eruptionAn eruption of Iliwerung volcano on 7 May 1948 produced a violent pyroclastic flow which reached the east coast and killed 300 cattle and destroying 100 farming sections. The eruption partly destroyed the lava dome. On 9 May, another eruption occurred at the lower eastern base of Iliwerung at about 140 m altitude and produced an ash plume of 4 km height, and opened a new 120 m wide crater, from which a viscous lava flow emerged, building up a new lava dome, called Iligripe. The new dome reached a height of 50 m by 11 May.
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Source: Report on the volcanic activity and volcanological research in indonesia during the period 1936–1948, R. W. van Bemmelen, Bul. Volc, V.9, Nr 1, 3-2

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